Rotary oven



May 30, 1944; w, A. ROBERTS ETIAL ,0

ROTARY OVEN Filed Sept. 8 1942 2 Shets-Sheet l zZZzam A pze yez y 30, 4- w. A. ROBERTS ET AL 67 ROTARY OVEN Filed Sept. 8, 1942 2 Sheets-Sheet 2 V 54w 7 .Z' 9.. 9. T

WEZR0$67Z5 Patented May 30, 1944 William A. Roberts and William Spiegel,

' Butte, Mont.

Application September 8, 1942, Serial No; 457,684

1 Claim.

This invention relates to rotary ovens.

An object of this invention is to provide a rotary oven in which the heat is derived from electric heaters.

' Another object of this invention is to provide an improved rotary carrier for the articles which are being baked. w

A further object of this invention isto provide a rotary oven which includes a supporting frame embedded in heat insulated walls so that the interior of the oven may be kept clean.

A further object of this invention is to provide an oven of this kind having transparent panels in opposed walls, one of the panels being hinged ly mounted and constituting a collapsible shelf for supporting the trays which are placed into or removed from the oven.

A further object of this invention is to provide an oven of this kind in which the carrier is formed of a pair of spider elements mounted on a rotary shaft, and tray supports pivotally carried by the arms of the spider elements, the tray supports being formed of angle iron about three sides thereof and triangular end pieces which are pivoted to the arms of the spider elements so that the tray supports will remain in a horizontal position during rotation of the carrier.

With the foregoing objects and others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically referred to and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention as claimed.

In the drawings:

Figure 1 is a detail side elevation partly broken away-and in section of a rotary oven structure constructed according to an embodiment of this invention,

Figure 2 is a detail rear elevation partly broken away and in section-of the device,

Figure 3 is a detail side elevation partly broken away of the rotary carrier supporting frame structure which is embedded in the heat insulated side walls of the device,

Figure 4 is a plan view of one of the tray carriers,

Figure 5 is a sectional view taken onv the line 5-5 of Figure l, and

Figure 6 is a. fragmentary front elevation of the front wall of the housing.

Referring to the drawings, the numeral it designates generally a heat insulated housing which is formed of opposite side walls H and 7 l2, front and rear walls l3 and M respectively and a substantially semi-circular top wall l5. The housing ill is formed of an inner jacket l6 which is preferably of metallic construction andof an outer jacket H. The two jackets l6 and iii are spaced from each other and a. heat insulating means i8 is interposed between the two jackets it and ill.

The front wall 03 has a transparent panel l9 secured thereto .by means of removable fastening members at. The panel 89 is mounted in a rectangular metal frame at and is provided for the purpose of permitting persons to look into the interior of the housing it in order tosee the articles which are being baked and also to determine the character of the baking.

The rear wall i4 is provided with a hinged panel 22 which is mounted in a rectangular frame 23, and the panel 22 is hingedly mounted at its lower edge as at 24. The panel 22 comprises a hinged window and also a shelf on which the trays may be placed prior to or subsequent to the' positioning of the trays in the interior of the housing It). The panel 22 is adapted to be maintained in a horizontal shelf forming position as shown in Figure 1 by means of a pair of pivoted arms 25 which'are pivoted as at 26 to the opposite ends of the frame .23. The lower ends of the arms 25 are slidable in guides 21 which are secured to the outer face of the rear wall l4.

One of the side walls H has hingedly secured thereto upper and lower doors 28 and 29'which permit ready access to the interior of the housing ID in order to clean the housing or for other purposes.

opened to permit the desired access into the housing. The housing ID has embedded in the two side walls thereof a frame structure, generally designated as 30. The frame structure 30 comprises two upright frame members 3| and '32. The frame member 3| includes a lower horizontal frame bar 33 which is formed of angle iron and also is formed of an upper horizontal fiat frame bar 34. A pair of vertically disposed angle frame members 35 are secured between the lower and upper horizontal frame 7 bars 33v and 34, and a pair of upwardly converging bracing angle members 36 and 31 are as also secured between the lower and upper frame By providing the two doors '28 and 29 a selected one or both of these'doors may be members 33 and 34 and are secured in any suitthe side walls ii.

able manner to the vertical angle members 35,

The frame structure 32 comprises a lower horizontal frame member 39 of angle construction and an upper horizontal flat frame bar 39. The frame members 38 and 39 are held in spaced apart relation by means of a pair of vertical angle frame members 40 and 4|. The frame members 40 and 4| are secured to the frame members 33 and 39 and coact with these frame members in providing a door opening for the two doors 28 and 29. A pair of upwardlyconvergent bracing members 42 and 43 are secured at their lower ends to the horizontal frame member 38 and are secured at their upper ends to the vertical doorway forming frame members I! and 4|, respectively. Asshown in Figure 2, the two frame members 3| and 32 are adapted to be embedded in the heat insulating means between the inner and outer shells or jackets l8 and i! so that the interior of the housing l will be free of any obstructing frame members. The upper horizontal bars 34 and 39 have secured thereto bearing members 44, and preferably, one of the side walls ii is formed with an opening 45 which provides access to at least one of the bearings 44. A carrier shaft 33 is journalled in the two bearings 44 extending across the housing iii between The shaft 46 atone end extends exterioriy ofthe housing i9 and has secured thereto a sprocket 41. The shaft 68 is adapted to be rotated by means of a power member 48 in the form of a motor or the like which has secured to the drive shaft 69 thereof a. driving sprocket 50. A chain or other flexible drive member M is trained about the driving member 50 and the driven member 47.

The shaft 46 has fixedly secured thereto within the housing It a pairof spider members and 52. like construction and each includes a central hub 53 which has formed integral therewith a plurality of radially arranged arms 54. The two spider members 5| and 52 are so arranged that one arm 54 thereof will be disposed in the same plane as an associated arm of the spider mem- The spider members 5| and 52 are of,

ber 52. The pairs of associated arms 54 of the two spiders 5| anad 52 have dependingly and pivotally secured therebetween tray carriers or supports 55. The tray carriers or supports: 55 are constructed, as shown in Figure 4, of a rear angle bar 56, a pair of side angle bars 51 and a forward flat bar 58. The flat bar 58 is se'cured at the opposite ends thereof to a connecting plate 59 which underlies the adjacent horizontal side of a side member 51 and is secured thereto by fastening devices 80 or the like in the form of rivets. The vertical sides 3| of the side members 51 have fixed thereto upstanding triangular side plates 63. The side plates 63 at their upper -ends or apices thereof have formed integral therewith an upwardly extending stem 64 which is pivotally secured by means of a pivot member 65 to a spider arm 54. The flat bar 53 forms an open end of the skeleton frame formedby the angle members 55 and 51 so that the trays supporting the edibles may be moved over the flat bar 58 into the carrier 55.

The housing II) has mounted in the lower portion thereof and below.the circle described by the rotation of the tray carriers a pair of electrical heating elements 68. The heating elements 89 are controlled by means of a thermostat 31 which has one side thereof connected by means of a conductor 69 to the heating elements GI and the other side of the thermostat 61 is connected by means ofa conductor 69 to an input connection. 10. The input connection II is connected by means of a conductor II to the other side of the heating element 66. The thermostat 61 may have a shaft 12 connected therewith which terminates at its outer end exteriorly of the housing Ill and may be provided with an-indicating arm or pointer 13 so that the thermostat, 61 may be manually adjusted as to its operation exterioriy of the housing ID. The housing iii may also have mounted on the interiorithereof a pair of light bulbs 14 which are mounted in sockets secured to the side wall H.

The top wall it of the housing i9, preferably, has a vent tube i6 mounted therein so that the fumes from the interior of the housing i9 may. if desired, be carried off to a suitable point remote from the housing.

In the use and operation of this oven, the heaters 36 are connected to a suitable source of electric current supply through the input connection iii. The rotation of the motor 68 will rotate the carrier structure including the two spiders 5| and 52, and the several tray carriers 55 which are pivotally and dependingly supported from the arms 54 of the spiders 5i and 52 will be maintained in a horizontal position throughout the rotation of the spiders 5i and 52 by the depending supports for these tray carriers. The heating elements 56 may be of a character toprovide several diflerent degrees of temperature within the housing i0 and such degrees may be regulated through the medium of the thermostat 61.

By providing'the supporting structure for-the rotary tray carriers as herein disclosed, the interior of the housing can easily be cleaned and by insulating the entire housing iii, the heat generated from the heaters 66 will be retained within the housing. This rotary oven may be of a size such that it may be mounted in a store window or, the like so that the customers may see the articles as they are being baked.

What we claim is':

A rotary oven comprising a heat insulated housing formed of opposite side, front and rear walls, and a substantially semi-circular top wall, said walls including inner and outer jackets and heat insulating means between said Jackets, 8. carrier support comprising a pair of upstanding frame members embedded in the insulation of said side walls. a rotary shaft carried by the upper portions of said members and extending through said oven, and a rotary carrier means fixed to said shaft, each frame member comprising upper and lower horizontal angle members, a pair of'vertical angle members secured between said horizontal angle members and inwardly from the ends of the latter, and upwardly convergent bracing members extending up- ;vardly from said lower horizontal angle mem- WILLIAM SPIEGEL. WILLIAM A. ROBERTS. 

